+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120378 (2005 QL9) Classification: Main-belt Asteroid          SPK-ID: 2120378 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1939338577516797 5.1566e-08   a 2.662980728807432 1.4705e-08 au q 2.146538602951427 1.3714e-07 au i 6.443121725468544 5.6943e-06 deg node 12.48678893280637 3.9087e-05 deg peri 327.0051188667101 4.0856e-05 deg M 192.8685598834114 1.2493e-05 deg tp 2459937.395860448773 (2022-Dec-23.89586045) 5.7648e-05 TDB period 1587.268736370014 4.35 1.3147e-05 3.599e-08 d yr n .2268046939696538 1.8786e-09 deg/d Q 3.179422854663437 1.7556e-08 au   Orbit Determination Parameters    # obs. used (total)      371      data-arc span      9475 days (25.94 yr)      first obs. used      1995-03-29      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59426      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 17:06:10   Additional Information  Earth MOID = 1.13981 au   Jupiter MOID = 2.23215 au   T_jup = 3.349  [ hide covariance matrix ] Orbital Elements at Epoch 2457230.5 (2015-Jul-27.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1951940242082086 5.1992e-08   q 2.142257915688092 1.3845e-07 au tp 2456758.135864736326 (2014-Apr-10.63586474) 4.9844e-05 TDB node 12.54931215077541 3.9112e-05 deg peri 326.159261103114 4.0826e-05 deg i 6.445809628820518 5.692e-06 deg   Orbit Determination Parameters    # obs. used (total)      371      data-arc span      9475 days (25.94 yr)      first obs. used      1995-03-29      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59426      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 17:06:10   Additional Information  Jupiter MOID = 2.23215 au   T_jup = 3.349  Orbit Covariance (6×6)   e q tp node peri i e 2.703206149028195E-15 -7.172581542211396E-15 6.364646663317554E-13 -7.748447150369752E-15 8.083315560109742E-14 4.260882035836837E-16 q -7.172581542211396E-15 1.916882535906265E-14 -1.671283576103891E-12 2.087833402293542E-14 -2.021225990043385E-13 -1.073544367931766E-15 tp 6.364646663317554E-13 -1.671283576103891E-12 2.484437267601702E-9 -2.84230665856353E-12 5.946370190304468E-10 -1.543205371974653E-12 node -7.748447150369752E-15 2.087833402293542E-14 -2.84230665856353E-12 1.529730621209816E-9 -1.519990258322628E-9 -1.398002390868237E-11 peri 8.083315560109742E-14 -2.021225990043385E-13 5.946370190304468E-10 -1.519990258322628E-9 1.66674692562639E-9 1.348755927282766E-11 i 4.260882035836837E-16 -1.073544367931766E-15 -1.543205371974653E-12 -1.398002390868237E-11 1.348755927282766E-11 3.239849419974888E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.42   n/a E2021B55   120378 (2005 QL9)          Discovered 2005-Aug-25 by NEAT at Palomar Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 Alternate Designations  2005 QL9 = 1995 FB18  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 14:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin